TL ConTeXt in minimal setup

[Karl Berry]

    OK, you have to run mtxrun with LuaTeX:
       luatex --luaonly <path-to>/mtxrun.lua --generate

Thanks Joseph. It seems complex to be the invocation for tlmgr, though
could be done, of course. I also thought context automatically rebuilt
its stuff at the drop of a hat precisely to avoid such manual
rebuilds. I'm baffled as usual.

Max ... help :)? What should tlmgr do? --karl